Friday marks 30 years since Thomas Hamilton murdered 16 children and a teacher at Dunblane Primary School and wounded 15 people, before killing himself. The incident, on March 13 1996, remains the UK's worst mass shooting.

Friday marks 30 years since Thomas Hamilton murdered 16 children and a teacher at Dunblane Primary School and wounded 15 people, before killing himself. The incident, on March 13 1996, remains the UK's worst mass shooting.